Factor analysis and numerical simulation of rock breaking efficiency of TBM deep rock mass based on orthogonal design

被引：23
作者：
Li Xiao-jing [1 ,2 ]
Zhang Hua-ken [2 ]
Bai Yi-fan [2 ]
Zhang Xiang-yang [2 ]
机构：
[1] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430071, Peoples R China
[2] Shandong Jianzhu Univ, Coll Civil Engn, Jinan 250100, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2022年 / 29卷 / 04期
基金：
中国国家自然科学基金;
关键词：
deep rock mass; TBM rock breaking; rock breaking specific energy; rock breaking efficiency; DISC CUTTER; EXCAVATION; STRESS; FRAGMENTATION; DISPLACEMENT; PERFORMANCE; GRANITE; ZONE;
D O I：
10.1007/s11771-022-4994-9
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
This study investigates the factors affecting the rock-breaking efficiency of the TBM disc cutter in deep rock excavation, including confining pressure, penetration, cutter spacing, and revolution speed. The finite element method is employed to formulate a rock-breaking model of the rotary disc cutters and a numerical simulation is also implemented. The rock breaking effect, rock breaking volume, and rock breaking specific energy consumption under different combinations of the factors are investigated. An orthogonal test of four factors at four levels was constructed. Based on the test results and range analysis in the process of deep rock mass breaking, the order of sensitivity of each influencing factor with respect to the rock breaking specific energy for the disc cutter is cutter spacing > revolution speed > penetration > confining pressure. By constructing a numerical simulation comparison scheme, the orthogonal test results are analyzed and corroborated, and the rock breaking law and rock breaking efficiency under different influencing factors are derived. Finally, the sensitivity of different influencing factors on the rock-breaking efficiency is verified.
引用
收藏
页码：1345 / 1362
页数：18
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